Improvement in metal-rolling machines



UNITED STATES Aln'rnNT Qrrion.

JOSIAH HLMES, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO IIIMSELF ANDHUSSEY, WELLS 85 GO., OF SAME PLAGE.

IMPROVEMENT IN METAL-ROLLING MACHINES.

Specification forming part of Letters Patent No. 160,433, dated March 2,1875; application filed January 29, 1875. i

To all whom it may concern: A

Beitknown that I, J osrnu HOLMES, of Pittsburg, county of Allegheny,State of Pennsylvania, have invented or discovered a new and usefulImprovement in Machines for Bolling Taper Rounds; and I do herebydeclare the following to be a full, clear, concise, and exactdescription thereof, reference being had to the accompanying drawingmaking a part of this specification, in which like letters indicate likeparts.

Figure l is a top or plan view of my machine. Fig. 2 is a sectional viewthrough the disk-rolls and guide lengthwise of the latter, and Fig. 3 isa perspective view of the guide and one of the disk-rolls.

My improvement is particularly designed for use in tapering the ends ofhorse-rake teeth, and generally in the rolling of metal rods and bars tothe form of a tapering round, and it is also applicable to the rollingand finishing of metal rounds.

The machine consists in its important feature of a pair of .disk-rollsgeared to revolve in opposite directions face to face, with faces madeplain, as distinguished from concave or convex, but with their axes alittle out of line. A suitable guide is provided for keeping the articleoperated on in the desired line of bite.

The bed or foundation A carries the supporting-plates A, adj ustablybolted thereto by the use of bolts, nuts, and slots, as at a, and set asmay be desired by set-screws c1. The plumber-blocks B rest thereon, andare adjustably screwed thereto by like nuts, bolts, and slots b, and areset or adjusted by set-screws b1, working through lugs a2 on the platesA' against lugs b2 on the bases of the plumber-blocks. Theseplumber-blocks carry the axes or journals B1 of the disk-rolls B2, andon these axes are the band-wheels D and balance-wheels D', for the usualpurposes. The disk-rolls B2 are each securely aflixed to the inner endof its axle. They are made plane or flat-faced, and are mounted oradjusted so that when in operation their adjacent faces shall be out ofparallel with, or shall be inclined to, each other to a degree or extentcorresponding to the taper desired in the horse-rake tooth or otherarticle to be tapered. The centers of the two disk rolls are directlyopposite each other, or nearly so. The best line of bite in this machineis from a point at or a little above the centers of the disk-rolls totheir peripheries. Between the rolls, and along such line of bite, Iarrange a guide, P, supported by a plumber-block or post, P', frombelow'. For convenience in feeding, this guide extends through at thefeeding end to the periphery of the rolls, where it has afeeding-aperture, c. From a point at or about opposite to the centers ofthe rolls to the opposite end the guide has open sides, and is madenarrow above and below, so that the rolls may take a bite on the rod fedtherein.

In practice, I prefer to make the distance between the centers of thedisk-rolls equal to or slightly greater than the diameter of the articleto be tapered, and then set the rolls at such angle as to give thedesired length and slope of taper to the article operated on. Theserolls are caused to revolve in opposite directions, as indicated byarrows.

The article to be tapered is fed in at the opening c, and, on reachingprpassing a little beyond v the centers of the rolls, is engaged ou bothsides by the disk-faces, is thereby rotated rapidly, and is drawn alongand tapered. As soon as the desired length of taper is secured, one orboth of the screws g, which play through posts g against the ends of theaxes, are slackened up, which allows the corresponding roll or rolls togive way slightly and loosen the bite on the rod, after which thetapered rod may be withdrawn, the roll or rolls screwed up again toposition, and the operation repeated. The roll-axles have a slightlongitudinal motion for this purpose, and such motion may be fixed inamount each way by the usual known appliances for such purpose. Butinstead of slackening up the screws g as soon as the tapering rod isformed, the operation may be allowed to go on, in which case the rod,tube, or bar will be fed longitudinally through between the rolls, andcome out of the guide P rolled to a round of a diameter equal to theleast distance between the rolls along the line of bite, and such use ofmy machine in rounding, straightening, and finishing is hereby includedherein. But in such use the disk-rolls are in most cases set at a lessinclination to each other than shown,

so that the reduction effected by rolling shall be such as may berequired to produce the round of the diameter desired.

rlhe forward feed of the rod is secured in this machine by arranging theguide P with its axial line a little above the centers of the disk-rollsB2, as illustrated by dotted lines in Fig. 3; or the same result maybesecured by other known means, such as giving one roll a speed slightlygreater than that of the other.

While showing, and in general terms describing, ameans of adjustment, Ido not limit myself in this respect, since other known means ofadjusting the disk-rolls, and also of loosening the bite of one or both,may be substituted. Such devices as are common and well known inconnection with metal rolls and housings may be used with the disk-rollsdescribed,'and in such use they may be mounted in housing of anysuitable construction.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. A pair of plane-faced disk-rolls with their faces inclined to eachother and theircenters opposite, and arranged for the introduction ofthe rod or bar to be tapered on the side of the greatest opening, thefeed being from such side toward the side of the least opening, whereby,on the completion of the taper, the rolls will have a bite or bearingalong the entire length of the taper, substantially as set forth.

2. The plane-faced inclined disk-rolls B2 B2, arranged with a line ofbite from at or near the center to the side of least opening, incombination with an open-sided tapering guide arranged along such lineof bite, and with reference to a feed from the side of greatest opening,substantially as set forth.

In testimony whereof I have hereunto set my hand.

JOSIAH HOLMES. Y

Witnesses:

J AMns M. CHuIs'rY, CHARLES G. PAGE.

